@laur, you've been waiting for a reply for the past hour (I can see who's online) so I'll do my best here, which isn't much.
There may be a bug in Parental Controls, but I haven't got it in my McAfee installation and we don't get many posts about it. I'll have to post a question for the next conference call and hope that someone there can come back with an answer.
I checked your other posts and I see that this is Family Protection not Parental Controls. I know that Family Protection has had an update recently. What version have you got?
No-one else has reported this so I'm at a loss to know what could be the cause.